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Data-retransmitting method and apparatus

A data retransmission and protocol data unit technology, applied in the field of data retransmission, can solve problems such as wasting system resources and affecting transmission efficiency, and achieve the effect of avoiding retransmission of large blocks of data and reducing waste

Inactive Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The present invention provides a data retransmission method and device to solve the problems in the prior art that when data transmission fails at the physical layer, the sending end needs to retransmit the entire data unit before division, which affects transmission efficiency and wastes system resources.

Method used

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  • Data-retransmitting method and apparatus
  • Data-retransmitting method and apparatus
  • Data-retransmitting method and apparatus

Examples

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Embodiment Construction

[0042] This embodiment takes the data transmission in the WCDMA system as an example for description.

[0043] After the protocol data unit is segmented according to the physical layer transmission format, when an error occurs in the transmission of the segmented block at the physical layer, in order to avoid retransmission of the entire protocol data unit, the present invention is in the segmentation attribute field added for the segmented segment Record the segmentation block identifier, which can effectively identify a segmentation block among all the segmentation blocks saved at the local end, that is, identify a unique segmentation block; when the protocol data unit is segmented, the concatenated physical frame is transmitted at the physical layer When an error occurs, it is only necessary to extract the corresponding segment from the stored segment according to the segment identifier.

[0044] The segmented data unit can be the protocol data unit that is segmented at the rad...

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Abstract

This invention discloses a method for re-transmitting data, in which, when the sending end segments a protocol data unit in terms of the transmission format of the physical layer, it registers the ID of the segment blocks in the segment attribute domain added for the segment blocks, which can identify a block effectively in all the blocks stored in the local end, the receiving end receives the physical frame and carries the segment block ID of the blocks in the physical frame in the receiving confirming information fed back to the sending end and when the sending end decides that the receiving end does not receive the blocks correctly, it picks up the corresponding blocks from the stored blocks and re-transmits them. This invention also discloses a data transmission device.

Description

Technical field [0001] The present invention relates to the fields of communications and computers, and in particular to a method and device for data retransmission. Background technique [0002] The technical specifications of the WCDMA system have gone through the stages of Release 99, Release 4, Release 5 and Release 6. At present, the standardization work on Release 7 has been implemented. At the same time, the longer-term LTE (Long Term Evolution) research has gradually become a new hot spot for standardization work. [0003] In the Release 99 system, dedicated channels are used for uplink and downlink, which can reach a maximum rate of 384kbps; in Release 4, the Mobile Service Switch Center (MSC) is split into an MSC server (MSC Server) and a multimedia gateway (Multi-media). GateWay, MGW), separates control and business; In Release 5, the concept of IP Multi-media Subsystem (IMS) is introduced, based on the IP transport layer, and high-speed downlink packet access is intro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/08H04L1/16
CPCH04L1/1812H04L1/0079H04L1/1809H04L1/1887H04W80/02
Inventor 秦亚莉李荣强
Owner HUAWEI TECH CO LTD
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